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Tuesday, November 8, 2016

Circuit Schematic Diagram PWM Lamp Dimmer using NE555 IC

ElcoHow. - This is one circuit schematic diagram of PWM Lamp Dimmer using NE555 IC that very useful for you who want to dimmer lamp easily only using simple and familiar components.

In this time, we will give you global description about this PWM Lamp Dimmer using NE555 IC like in Figure 1 below, beside we give you circuit schematic diagram and component parts used in this circuit.

Circuit Schematic Diagram

Component Parts


  1. NE555IC
  2. Resistors
  3. Capacitors
  4. Variable Resistors
  5. Diode
  6. Transistors
  7. Lamp

Description

This is circuit schematic diagram of PWM Lamp Dimmer using NE555 IC that can help you to build your self dimmer lamp. The main component in this circuit are transistors and IC NE555. 

According Circuitstoday site that also published this circuit describe that NE555 timer IC which is wired as an astable multivibrator operating at 2.8KHz forms the heart of this circuit. Resistors R1,R2, POT R3 and capacitor C1 are the timing components. Duty cycle of the IC’s output can be adjusted using the POT R3. higher the duty cycle means higher the lamp brightness and lower the duty cycle means lower the lamp brightness. Diode D1 by-passes the lower half of the POT R3 during the charging cycle of the astable multivibrator. This is done in order to keep the output frequency constant irrespective of the duty cycle. Transistors Q1 and Q2 forms a darlington driver stage for the 12V lamp. Resistor R4 limits the base current of transistor Q1.

Now, you can read more about this PWM Lamp Dimmer using NE555 IC circuit schematic diagram, from original source using link here.


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